target/linux/brcm2708/patches-4.4/0558-BCM270X_DT-Add-i2c-sensor-overlay.patch

   1 From ec94d922b57bb7d6586eaf1e1af02e9383680d15 Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Mon, 5 Dec 2016 17:10:44 +0000
   4 Subject: [PATCH] BCM270X_DT: Add i2c-sensor overlay
   5
   6 The i2c-sensor overlay is a container for various pressure and
   7 temperature sensors, currently bmp085 and bmp280. The standalone
   8 bmp085_i2c-sensor overlay is now deprecated.
   9
  10 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
  11 ---
  12  arch/arm/boot/dts/overlays/Makefile               |  1 +
  13  arch/arm/boot/dts/overlays/README                 | 12 ++++++--
  14  arch/arm/boot/dts/overlays/i2c-sensor-overlay.dts | 34 +++++++++++++++++++++++
  15  3 files changed, 45 insertions(+), 2 deletions(-)
  16  create mode 100644 arch/arm/boot/dts/overlays/i2c-sensor-overlay.dts
  17
  18 diff --git a/arch/arm/boot/dts/overlays/Makefile b/arch/arm/boot/dts/overlays/Makefile
  19 index c4186aa..bc7f4a9 100644
  20 --- a/arch/arm/boot/dts/overlays/Makefile
  21 +++ b/arch/arm/boot/dts/overlays/Makefile
  22 @@ -42,6 +42,7 @@ dtbo-$(RPI_DT_OVERLAYS) += i2c-gpio.dtbo
  23  dtbo-$(RPI_DT_OVERLAYS) += i2c-mux.dtbo
  24  dtbo-$(RPI_DT_OVERLAYS) += i2c-pwm-pca9685a.dtbo
  25  dtbo-$(RPI_DT_OVERLAYS) += i2c-rtc.dtbo
  26 +dtbo-$(RPI_DT_OVERLAYS) += i2c-sensor.dtbo
  27  dtbo-$(RPI_DT_OVERLAYS) += i2c0-bcm2708.dtbo
  28  dtbo-$(RPI_DT_OVERLAYS) += i2c1-bcm2708.dtbo
  29  dtbo-$(RPI_DT_OVERLAYS) += i2s-gpio28-31.dtbo
  30 diff --git a/arch/arm/boot/dts/overlays/README b/arch/arm/boot/dts/overlays/README
  31 index 4a77ee6..80ea3de 100644
  32 --- a/arch/arm/boot/dts/overlays/README
  33 +++ b/arch/arm/boot/dts/overlays/README
  34 @@ -283,8 +283,7 @@ Params: swap_lr                 Reverse the channel allocation, which will also
  35
  36
  37  Name:   bmp085_i2c-sensor
  38 -Info:   Configures the BMP085/BMP180 digital barometric pressure and temperature
  39 -        sensors from Bosch Sensortec
  40 +Info:   This overlay is now deprecated - see i2c-sensor
  41  Load:   dtoverlay=bmp085_i2c-sensor
  42  Params: <None>
  43
  44 @@ -536,6 +535,15 @@ Params: abx80x                  Select one of the ABx80x family:
  45                                  source
  46
  47
  48 +Name:   i2c-sensor
  49 +Info:   Adds support for a number of I2C barometric pressure and temperature
  50 +        sensors on i2c_arm
  51 +Load:   dtoverlay=i2c-sensor,<param>=<val>
  52 +Params: bmp085                  Select the Bosch sensortronic BMP085
  53 +
  54 +        bmp280                  Select the Bosch sensortronic BMP280
  55 +
  56 +
  57  Name:   i2c0-bcm2708
  58  Info:   Enable the i2c_bcm2708 driver for the i2c0 bus. Not all pin combinations
  59          are usable on all platforms.
  60 diff --git a/arch/arm/boot/dts/overlays/i2c-sensor-overlay.dts b/arch/arm/boot/dts/overlays/i2c-sensor-overlay.dts
  61 new file mode 100644
  62 index 0000000..f6d134c
  63 --- /dev/null
  64 +++ b/arch/arm/boot/dts/overlays/i2c-sensor-overlay.dts
  65 @@ -0,0 +1,34 @@
  66 +// Definitions for a few digital barometric pressure and temperature sensors
  67 +/dts-v1/;
  68 +/plugin/;
  69 +
  70 +/ {
  71 +        compatible = "brcm,bcm2708";
  72 +
  73 +        fragment@0 {
  74 +                target = <&i2c_arm>;
  75 +                __overlay__ {
  76 +                        #address-cells = <1>;
  77 +                        #size-cells = <0>;
  78 +                        status = "okay";
  79 +
  80 +                        bmp085: bmp085@77 {
  81 +                                compatible = "bosch,bmp085";
  82 +                                reg = <0x77>;
  83 +                                default-oversampling = <3>;
  84 +                                status = "disable";
  85 +                        };
  86 +
  87 +                        bmp280: bmp280@76 {
  88 +                                compatible = "bosch,bmp280";
  89 +                                reg = <0x76>;
  90 +                                status = "disable";
  91 +                        };
  92 +                };
  93 +        };
  94 +
  95 +       __overrides__ {
  96 +               bmp085 = <&bmp085>,"status";
  97 +               bmp280 = <&bmp280>,"status";
  98 +       };
  99 +};
 100 --
 101 2.1.4
 102